I wanna tell you something I found while Macroing, (removing spray can color thing)
You don't have to restart Blockland for this to work.
1. Get the Macro Saver mod (If you have it, skip)
2. Build and save the macro you want to modify (If you have one, skip)
3. Go to the Blockland folder (usually in My Documents)
4. Go to Config>Client>Macros
5. Open the macro you want to modify
6. Find "Server UseSprayCan" and delete the line it's on
7. Save it, then load the macro you modified.
Did it work for you?